How to paint the landscape

i have been trying to create a landscape in unreal engine 4.25 but when i create the landscape and drag a material into the landscape material the entire landscape becomes that color. from there i do everything that the tutorials say and i can get up to the part where they say that there is 3 different layers. snow, soil and grass. for me i don’t have any of these and i don’t have the magnifying glass or the plus sign. i do not know how to make new ones and i don’t know how to paint the landscape. any help is appreciated please